The Invalid function message

[infiniteness84]

Hello

I've set up a machine running original MS-DOS 6.22. When I try to make my CD ROM drive work it's ok but trying to list files on a CD with "dir" command brings the "Invalid function" message.
The strange thing is when I use MS-DOS 6.22 bootdisk with the same drivers then everything is alright and I can access this drive.

[patio]

See Here...

[infiniteness84]

I'm not exactly sure but I think mouse dongles won't help here... 

[patio]

Wrong Link...

[infiniteness84]

Unfortunately there's nothing about my problem in your link.

[Lisa_maree]

Hi

Do you have in the config.sys file
files=30
Buffers = 20

Here is a link to common config.sys and autoexec.bat files for dos https://www.computerhope.com/ac.htm

If adding those 2 commands doesn't fix it then check you are not loading the cdrom commands into high memory with the LH and devicehigh command. Just use load and device until it is working.
If you want you could copy the config.sys and Autoexec.bat files here for us to check

[infiniteness84]

@Lisa_maree
Yes I have this two lines in my config.sys file.
I tried to load drivers into conventional memory but it didn't help unfortunetaly.

These are my current files:
https://tinypic.pl/pc3ehln64s1r
https://tinypic.pl/83ur9nd2cawt.

[Lisa_maree]

Is the DVD drive Sata or IDE, And does the cd1.sys file support DVD  drives. Also are you using any adapters between the motherboard and the dvd drive, perhaps an IDE to sata adapter. You say the dos 6.22 disk works .
You could rename Autoexec.bat and config.sys then boot from the 6.22 disk and copy the config.sys and autoexec.bat files from the disk to the hard drive and test the computer boots and reads disks. Then add in the emm386 lines extra until it stops working.

[patio]

The last line in the config sys is likely the culprit...

[infiniteness84]

Is the DVD drive Sata or IDE, And does the cd1.sys file support DVD  drives. Also are you using any adapters between the motherboard and the dvd drive, perhaps an IDE to sata adapter. You say the dos 6.22 disk works .
You could rename Autoexec.bat and config.sys then boot from the 6.22 disk and copy the config.sys and autoexec.bat files from the disk to the hard drive and test the computer boots and reads disks. Then add in the emm386 lines extra until it stops working.

The DVD drive is IDE and CD1.SYS works with it when running from bootdisk. There are no adapters.

[infiniteness84]

The last line in the config sys is likely the culprit...

And why is that?

[patio]

Sorry i read it wrong...

[infiniteness84]

So I decided to install MS-DOS once again and it works now but:
1. Only if I never add LH or DEVICEHIGH before drivers, otherwise it won't work even if I remove it later which is not understandable for me at all.
2. Without LH and DEVICEHIGH some programs don't work because they're too big to fit into memory.

So  .

[Geek-9pm]

infiniteness84,
MS-DOS is no longer supported by Microsoft.
https://www.computerhope.com/history/dos.htm

1995    Windows 95 was released on August 24, 1995. In the Windows 95 command line, the operating system version number was listed as MS-DOS version 7.0.

That is about 24 years ago. 

[infiniteness84]

infiniteness84,
MS-DOS is no longer supported by Microsoft.
https://www.computerhope.com/history/dos.htmThat is about 24 years ago. 

So?
Can't people use it as a hobby? I don't believe everyone had this problem with cd drives and this topic is exactly about it.